Stop-motion.



PATENTED JUNE 30, 1903.

G. A. MARTIN. sToP MOTION.

APPLIUA-TION FILED FEB. 19. 1902.

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STOP MOTION.

APPLIOATION FILED rma. 19. 1902.

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G. 2A. MARTIN.

' sToP MoTIoN.

APPLIOATIQN FILED PEB, 19. 1902.

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L WS@ .jfl l v v ATTORNEYS UNITED STATES Patented June 3o, 1903.

PATENT OFFICE.

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SPECIFICATION forming part of Letters Patent N o. 732,573, dated June30, 1903.

Application tiled February 19,1902. Serial No. 94,811. (No modeLl T0a/ZZ whom it may concern:

Be it known that I, GEORGEA. MARTIN, a citizen of the UnitedStates, anda resident of Myerstown,in the countyof Lebanon and State ofPennsylvania, have invented a new and Improved Stop-Motion, 'ofwhich'the following is a full, clear, and exact description.

The object of the invention is to provide a new and improvedstop-motion, more especially designed for use'on knitting-machines,which is simple and durable in construction and arranged to insure aquick stopping of the machine as soon as ayarn or thread breaks or getscaught in the knot-catchersor becomes fastened on the spool or runsslack from the spool.

The invention consists of novel features and parts and combinationsofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is' represented in theaccompanying drawings,`

forming a part of this specification, in which similar characters ofreference indicate corresponding parts in all the views.

Figure lis a side elevation of the improvement as applied to acircular-knitting machine. Fig. 2 is an enlarged plan view of theimprovement. Fig. 3 is a sectional plan view of part of the same on theline 3 3 of Fig. 5. Fig. 4 is a plan view of the knot-catchers. Fig. 5is a front elevation of the improvement. Fig. 6 is a similar view of thesame, showing the parts on one side in position when the thread or yarnis broken; and Fig. 7 is a sectional side elevation of part of theimprovement, the section being on the line 7 7 of Fig. 3.

On the bed of the knitting-machine is se-` cured ahorizontally-extending bracket A supportinga hollow post B, throughwhich extends a drop-rod C, provided near its upper end with a col-larC', (see Fig. 7,) adapted swings the lever D out of engagement with thecollar C', so that the -rod C drops lin the 'hollow post B and in doingso actua-tes the belt-shifting device to move the belt from the fastpulley to the loose pulley and stop the machine.

As shown in Fig. 1, the lower end of the dro p-rod C isprovided with afoot C2, adapted to engage a disk G,'adjustably secured by a vset-screwor other means on an arm G', proj ectin g from a shaft G2, carrying abelt-shifter arm G2, connected with a belt-shifter H. The disk G is madeadjustable, so that the device can be readily adapted toknitting-machines of different makes and sizes. Now when the rod Cdrops, as above' described, its foot C2 dropsonto the disk G, so as toimpart a downward -swinging motion to the arm G',

to turn the shaft G2 and swing the arm 'GS pin F', normally engaged atthe underside by the inner ends of tw'o levers I, fulcrumed at I on thehead B' and. extendingl in opposite directions, each of the levers Ihaving its outer end I2 curved and engaged by an eye J held to swivel inan arm K' of a bell-crank lever K, Vnormally heldin a horizontalposition by the yarn or thread L, passing through oppositely-disposednotches N in a weighted lever-'frame N, between the side arms ofwhich-passes the bell-crank lever K. The

ylever-frame N is formed with a shaft N2, j ournaledin the outer end ofthehead B', and on the said shaft N2 is secured arearwardly-extendingarm N2, carrying a counterweght'N4, so as to normally hold theAlever-frame Nin a horizontal position, as plainly indicated in Fig. 5.

Now in case the-.thread or yarn L breaks then thebell-crank lever Kswings downward by its own weight and in doing so causes its arm K andeye J to impart a downward- IOO.

swinging motion to the lever I, so that the inner end thereof pressesthe pin F' in an upward direction to swing the catch F upwardly and outof engagement with the front end of the lever D, so that the spring Ethereof swings the front end of the lever outward andout of engagementwith the collar C to allow ,the rod C to drop for shifting the belt, aspreviously explained.

In case the yarn becomes fast between the machine and its spool then thepull exerted on the yarn by the machine causes a swinging of thelever-frame N in a downward direction, and as the bell-crank lever Krests on the downwardly-moving yarn L it is evident that it swings withthe frame, and its arm K' and eye J imparta swinging motion to the leverI to swing the catch F ont of engagement with the lever D.

A similar movement takes place when a knot gets caught in aknot-catcher, and in case the yarn becomes` too slackbetween the spooland the machine then the weight of the bell-crank lever K on the yarnovercomes the tension thereof, and consequently swings downward toimpart a swinging motion to the lever I for swinging the catch F upward.

In order to insure a quick dropping of the rod C, I provide aspring-pressed arm O, pressing on the upper end of the rod C, the saidarm O being secured on a shaft O', journaled in the. head B and havingan arm O2 connected by a link O5 with the rear 'end of the lever D. (SeeFigs. 2 and 3.) Now when the lever D is released and the spring E swingsit into an outermost position then the lever exerts a pull on the linkO3 and arm O2 to swing the arm O downward, and thereby cause the latterto exert a downward pressure on the rod C to insure a positive downwardmovement of the rod for swinging the arm G' downward.

Each of the yarns L unwinds from the usual spool P, the yarn extendingupward from the spool and passing through an eye Q, and then through aslotted knot-catcher R and then passes to the notches N of thelever-frame N, as previously explained, it being understood that theyarn passes from the notches N to the machine in the usual manner.

The eyes Q and knot-catchers R are secured on the bracket A, as plainlyshown in Figs. l and 4.

'Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. `A stop-motion, comprising a lever connected withthe belt-shifter of the machine on which the stop-motion is applied, ahollow post supported on the machine, a drop-rod extending through saidpost and adapted to impart a swinging motion to the lever, a supportingdevice for the drop-rod, a releasing device, a counterbalanced deviceover which the yarn passes, a device resting on the yarn and controllingthe releasing device, and a device engaging the drop-rod and arranged toimpart a downward movement thereto, the said device being connected withthe supporting device and actuated thereby when the supporting device isreleased, as set forth.

2. A stop-motion comprising a lever having a member connected with abelt-shifter, and a member. provided with an adjustable device on itsfree end, a drop-rod adapted to engage said adjustable device to imparta swinging motion to said lever, a supporting device for the saiddrop-rod, to hold the latter normally out of engagement with theadjustable device on the lever, the said supporting device comprising aspring-pressed lever, engaging a collar on the said drop-rod, to holdthe latter normally suspended, a locking-catch for holding the latter ina closed position, and a releasing device for the said catch, controlledby the yarn, as set forth.

3. A stop-motion comprisinga belt-shifting device a drop-red forimparting a swinging motion to the belt-shifting device, a supportingdevice for the said drop-rod, to hold the latter normally ont ofengagement with the belt-shifting device, the said supporting devicecomprising a spring-pressed lever, engaging a collar on the saiddrop-rod, to hold the latter normally suspended, a lockingcatch forholding the latter in a closed position, a releasing device for the saidcatch, controlled by the yarn, the said. releasing device consisting ofa lever engaging at one end a pin on the said catch, and a bell-cranklever having an eye engaging the other end of the said lever, the saidbell-crank lever resting on a yarn on its passage from the spool to themachine, as set forth.

4. A stop-motion comprising a drop-rod for imparting a swinging motionto the belt-shifting device, a supporting device for the said drop-rod,to hold the latter normally out of engagement with the belt-shiftingdevice, the said supporting device comprising a springpressed lever,engaging a collar on the said drop-rod, to hold the latter normallysuspended, a locking-catch for holding the latter in a closed position,a releasing device for the said catch, controlled 4by the yarn, the saidreleasing device consisting of a lever engaging at one end a pin on thesaid catch, a bell-crank lever having an eye engaging the other end ofthe said lever, the said bellcrank lever resting on a yarn on itspassagefrom the spool to the machine, and a counterbalanced, notchedlever-frame, over which passes the yarn, as set forth.

5. A stop-motion provided with a counterbalanced lever-frame, havingnotches for the passage of the yarn, and a bell-crank lever fulcrumed ona shaft of the said lever-frame and resting on that part of the yarnextending between the notches of the lever-frame, the said bell-cranklever controlling the releasing device, as set forth.

6. A stop-motion comprising a drop-rod for actuating the belt-shifter, aspring-pressed lever for supportin g the said drop-rod in a nor IIO IIS

ing part of a belt-shifting device, a drop-rodV for actuating saidlever, a spring-pressed 1ever engaging a collar on the drop-rod to holdthe rod normally suspended above the said lever, a catch for locking thespring-pressed lever in position when engaging the said droprod, areleasing device for the catch comprising a releasing-lever engagingsaid catch, a bell-crank lever for actuating the releasinglever, thesaid bell-crank lever restingon the yarn, andgmeans actuated by the saidspringpressed lever when released for imparting a positive downwardmotion tothe drop-rod, as set forth.

8. A stop-motion, comprising a lever connected with the belt-shifter ofthe machine on which the stop-motion is applied, a disk adjustablysecured on the free end of said lever, a horizontally-extending bracketon the said machine, a hollow post supported on said bracket, a drop-rodextending through said post and adapted to engage the said disk on thelever to impart a swinging motion to the lever, a supporting device forthe said droprod to hold the latter suspended above the lever, the saidsupporting device comprising a spring-pressed lever, a locking-catch forthe lever, and a 'releasing device for the catch controlled by the yarn,and an'arm engaging the drop-rod, and connected with thespringpressedlever, the said arm being actuated by the lever when thelatter is released, as set forth.

9. A stop-motion, comprising a drop-rod for actuating the belt-shifter,aspring-pressed lever f or supporting the drop-rod -in anormal uppermostposition, means for locking thelever in supporting position against thetension of its spring, a releasing device for said means, an armengaging theupper end of the droprod, a shaft mounted to turn andcarrying said arm, and a link connecting the said springpressed leverwith an arm on said shaft, as set v forth.

In testimony whereof I have signedpmy name to-this specincationin thepresence of two subscribing witnesses.

GEORGE A. MARTIN.

Witnesses:

MORRIS M. MILLER, WILLIAM F. MARTIN.

